Molding of spiral corrugated cast-iron pipe



June 30, 1925. 1,544,062

D. B. DIMICK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE Filed Nov. 10,1924 4 Sheets-Sheet 1 WM$M my.

June 30, 1925. 1,544,062

. o. B. DIMICK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE Filed Nov.10, 1924 4 Sheets-Sheet 2 IIL'if June 30, 1925.

1544.062 D. B. DHVHCK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE FiledNov. 10, 1924 4 Sheets-Sheet 5 June 30, 1925.

1,544,062 D. B. DIMICK MOLDING OF SPIRAL CORRUGATED CAST IRON PIPE FiledNov. 10, 1924 4 Sheets-Sheet 4 Sand, Bin 8( Conveyors.

Patented June 30, 1925.

UNITED sures DANIEL A eR'p IeK, OF armvn iermlyr, ALABAMA.

MOLDING OF SPI BAL CORRUGATED CAST-IRON ZPIBE.

An mat on fi o em er 9 45% fi el N meqes- Te al t gm it hey mncemi? B itkn wn tha De i J4me D Q e e t eh if h Un t Stete es eie at irmi ham, n heiih y ef Je eieeh and S ate Alabama, h ve invented eih ne an usefullmprei ehiee e Male-- ng Qf p ral Gerr getee flee l ee Ihpe; end I doy'deelee f l qwihge he a f l, d ne-e xee eee riptien f t n e ti s ch eswil ena le etheee ehilled n the ap to which it eiipe teihe t mehe and uth Th meeent r htien relates s impe ements i apparatus fer ast ng p eeand e la es re pa cul ly to the pieeue en Qfi aml s spirelly e rmg tedy-l drieel p p of the kind sh wn he l described iii my ta-p nd ngapplicatien e tled Ca Pip and joint therefor, filed September 16, 1922,Serial No, 588,659.

A p ou machin for v he asting ,Qf p pe of th s ha n-a l r is shewh e dier scribed ina second copendi-ng application, Serial No. 588,649, filedSeptember 165, 1922. According to this previous meeh ne t e helle pir ly c r gate p t rn, aft r orming the mold ,eavity, is itselfsimultaneously rotated and lifted axially of-the mold Where by to i hdnw he patt r fnem t eaYit-y- In accordance with the present invention thep t ern is simply l t a ially, hi held against rotation, during rotarymoyeen ef he mold; nd e n eq eh le i s t purpose of h present in eh zQhi0 d seeuee with the mor comp ica ed me henism cluded in the previousmachine for imposing a simultaneous rotary and axial movem upeh t patt rin fe e e a eih pl tied construction in which the pattern is madenon-rotatable and .capable of xiai movement, the axial movement beingaccent plished ,hy the simple rotation oi the mold aided bycounterweights and possibly by the hand of the operator.

A further .objeet of the present invention is to provide for theefficient ionndry hendli ng ot the patterns and molds an i so groupingunits of the mechanism es-to econ; omize 0, 1 QQI' space in the foundryand upon the number of operators required to attend a given number ofthe machines.

W ith the foregoing and other ohjeqts in View, the invention will bemore fully described hereinafter, and will be lQlB par-i ticulerlyeoihte l, .ei t i the el -m app nded henete; 1

In e draw n he e n ik mhe fer h l k .1" i'eeeehiiih P tth ut h s ver l iws F re 1 e 74 de ele a n, t Pei-1 in section of the improved machine.

- Fi u 2 is .e v r l sec i n taken thr u h h m ch ne e ewi e' th patterand et parts in a subsequent position. i

i h i e ee plan ew hf ih eh n F eh e 4: s a tien taken e t line in Fgure 2 h h m wu g ewe he s de, and i ll? 5 4 di gremmetie ew she-Wi e gupin of ma in 'the ohhde y floor. r

Re e r n f th Prese t the F u s 1 t 4 inclusive 6 designates thecylindrical, hole Lo spi a y p me te pehernemeeended lew th e t end ofth arm 7 Whie i pe mitt d to s ide verti a ly pen the Pest hut pr v nt dfro rht ti 'reletive e h pe t by reeeeh 9 the enga emen 9f the key 9 inthe ertical groove 1Q'pf e tire post. he pest, ewe e is it e f e t whehe b su tantia y er al eXi ee the his purpeee i is me h ed n theeylieiil ie p deete .11 he ihg he P rfere ee engee a it he by whi it isei eh e e th base pl e or bed 12*, the heeeph e ei i urn belied e eth rii e efl ii t9 h eeor pilnd i ci h Ahti-ih etieh heei e lie are nt rp edhehee h th w r nd 9 th pest ,8- .te e erd easy retetien he by the heldof h 0P. QI- he him 7 t ms w lei'e y Wh eh th poe n patterh m y whngihres and e a e eemph etiye ews h w me th We ee iiiehe' ef the erm- Whe teett rn hi the eee eh e r th m l plug pi w re? ns rted hrehgh h p de taleha ihhe e ee et i he met te he di he eerie .eee e e iei h e net h- Adue h l 14.6 is med he the m i et ehe-Ye the ee e hsl i th ped sta toexe he te ieh ii-ether from the hearings. t The arm 7 is preferablycounterhelaneed he a d in the ve ti al I.eev.emeht, es th wh n its relshe nd l tt re th s ph pee em 7 is el i e e th wee; nd th pe t- Fr m heepxh iid e ai re t ward m 8 end 2 eeir of ms -9 h ea eeri -Wi p l yewhere 2 and '2 F9111 Ie ieh pi l ye e .e wh e Fig r 3., th irez t pullye ei g ie w th the eeer-eell ye see as 9 the the t lee 12 we pled tothe arm 7 and toeye bolts 24 sus; tainingthe counter Weight 25.-

The cables may be wrapped one or more times about the pulleys. foundbest to simply have the cables play up and over the front pulleys and tobe wrapped once about the rear pulleys. The counter balance weights 25may be added to or reduced.

"As shown in Figure 1 an endless hand cable or strap '26 extends downfrom a wheel 27 mounted upon the shaft 28 upon the cap plate. This shaftcarries a pinion 29 meshing with a gear wheel 30 on the rear pulleyshaft 31. By drawing upon either run of the cable 26' the operator mayaid the vertical movement of the pattern.

The outer end of the arm carries an integral or attached ring 32adapted'to receive the ring 33 of the coupling head 34, bolts or otherfastenings 35 being employed to detachably hold the rings together. Thedrawing head is provided with external and internal spaced flanges 36and 37 to receive the upper ring 38 of the pattern 6. Pins 39 passingthrough the flanges 38 and 37 and the ring 38 are used to suspend thepattern from the head. This arrangement provides for flexibility in thepattern 6 to enable the pattern to accommodate itself to the mold and tothe cavityjin screwing out of the mold.

As shown in Figure 1 the pattern 6 is adapted initially to fit downwithin the mold composed of the cheek 40 and the core arbor41. Both thecheek and arbor are pinned or otherwise affixed to the casting stool 42as indicated respectively at 43 and 44. The mold parts are thuspreserved in proper spaced relation and at the same time caused to turnwith the casting stool 42. The casting stool 6 rests upon the turn table44 to which it is secured as by the 'pins 45.

The pattern 6, when in the mold, as appears'in Figure 1 fitssubstantially midway between the cheek and the core and a sandslinger isemployed to throw'sand upon both sides of the cylindrical pattern 6making, in one molding operation a spiral, continuously cylindricalcavity46 in the sand having external and internal walls upon which thespiral corrugation is simultaneously formed, the corrugations upon theinner Wall being in lead with those upon the outer wall. Y p

The stripping plate is designated at 47 and I is made up iri'two halfsections so that it maybe put in place upon the upper end of the check'40 after the sand has been introduced; The interior wall of thestripping plate is corrugated to conform to the externalcorrugations ofthe pattern 6 and to fit the outer'wall of the pattern snugly. Thisstripping plate is pinned-or clamped to the upper-end of "the cheek."Figure 2 shows the pattern withdrawn leaving the spiral cavity in themold and the stripping plate in place upon the top of the cheek. Inpractice-it is The turn table 44 is mounted upon the shaft 48 having theupper tapered portion 49 fitting in the upper tapered bearing 50provided with the removable cap plate or box 511 The lower portion ofthe shaft 48 fits within a cylindrical bearing 52 and upon anti-frictionbearings 53 in the base thereof while a dust collar 54 is secured uponthe shaft just above the lower cylindrical bearing 62. It is obviousthat the turn table might be supported in any other manner appropriateto sustain the weight of the mold and other parts while permitting offree rotation thereof. I

1 An internal gear 55 is made upon the lower portion ofthe turn table44. A pinion 56 meshes with the internal ear, the pinion being driven bythe'electrlc motor 57 through an appropriate reduction gear 58 havingthe high speed shaft 59 and the lower speed shaft 601*Any other motormight be used and appropriate control means is connected to the motor.

The apparatus might, for purposes of understanding the diagrammaticillustration in Figure 5, be divided upinto two parts, one called thecenteringmachine consisting of the rotatable post 8 and its supportingarm 7 by which the pattern'6 is brought to a correct position withrespect to the empty flask, and the second machine is the turningmachine or turn table 'consisting of the assembly for supporting andimparting to'the flask a rotary movementto effect removal of the pattern6 from the sand In Figure 5 the centering machines are designated C. M.and it will be "seen that three of thesecenterin'gmachines are employedlocated in triangular "arrangement. Each centering machine serves twoturn-fa bles drix en by the independent motors designated'at M'.

These turn tables are all located on'thc arc of a circlestruck from acenter "where the sand-slinger is located so tllttt'tllt? sandslingerhas a radius of activity covering all of the tables. *On'esand-slingeryis therefore easily enabledto take care-of the six flasksupon the turn tables." The sand-bin and conveyors are also indicated inthis dia grammatic viewat the open side of-the circle for supplying sandcontinuously to the sand-slinger." I

Vvhile the sand-s'linger 'is packing sai'ul" in a flask upon oneturntable of each pair the centering machine is engaged in placing apattern in the empty flask of the companion turn table 'so that theoperation is substantially a continuous one and three centering machinesand a single sand-'slinger are enabled to take care of six turn tables"After the flasks have been rammed and the patterns 6 removed, the flasksare withdrawn to the casting floor where the molten metal is poured inthe spiral cavity.

In the use of the device a pattern 6 is coupled to the arm 7 and thecolumn 8 is rotated until the pattern is centered above the empty flaskupon one of the turn tables. The plug 15 is then inserted in order toprevent possible angular movement of the column 8 and the arm 7 islowered until the pattern rests upon the casting stool.

The sand-slinger is then put into opcration and sand is rammed onto bothsides of the pattern 6. Subsequently the turn able -14 is caused torotate by closing the circuit of the electric motor 57 and inasmuch asthe pattern 6 is held fast against rotation the stripping plate will actas a revolving nut tending to lift the pattern out of the sand.

This movement is made easy by the use of the counter weight and also ifnecessary by the aid of the operator who may pull down upon the counterweight or press up on the arm 7. This pressure should be light in orderthat the spiral wall in the sand be not distorted.

The pattern is then swung to the other turn table and inserted in theflask and sand is rammed in this flask while the finished flask isremoved to the casting floor and an empty flask substituted in itsplace. The device and the assembly of these devices in the foundry areeflected with a view to simplicity in construction and a minimum numberof the machines without sacrificing the capacity of the plant. Thearrangement shown in Figure 5 makes it possible to operate the plantwith considerably less labor.

It is obvious that various changes and modifications may be made in thedetails of construction and design of the above spe cifically describedembodiment of this invention without departing from the spirit thereof.such changes and modifications being restricted only by the scope of thefollowing claims.

What is claimed is 2- 1. An apparatus for casting pipe comprising arotary turn table, means to rotate said turn table, a flask supportedupon said turn table, and a spiral pattern held again rotation andsupported for axial movement of the pattern.

2. An apparatus for casting pipe comprising a spirally corrugatedpattern. means for supporting said pattern for substantially axialmovement while holding said pattern against rotation. a flask forreceiving said pattern and having spaces for sand both upon the exteriorand interior of said spirally corrugated pattern. and means for supporting and rotating said flask to cause withdrawal of the pattern,

3. An apparatus for casting pipe comprising a rotary turn table, meansfor rotating said turn table, a flask adapted to fit upon said turntable, means for causing rotation of the flask with the turn table, aspirally corrugated pattern adapted to fit within said flask, and meansfor holding said pattern against rotation while permitting it to enterand leave the flask in a substantially vertical direction.

4. An apparatus for casting pipe comprising a rotary column. an armadapted to slide longitudinally on the column but held against relativerotation thereon. a spirally corrugated pattern carried fixedly by saidarm, a flask for receiving said pattern. and means for rotating andsupporting said flask.

5. An apparatus for casting pipe comprising a column, a support formounting the column. for swinging movement, an arm slidablelongitudinally on said column and turning with the column, counterweight means carried by said column and coupled to said arm, a spirallycorrugated pattern held fixedly by said arm. a flask adapted to receivesaid pattern, and means for rotating and supporting said flask.

6. An apparatus for casting pipe comprising a pedestal. a columnsupported for rotary movement therein, an arm keyed for slidablemovement up and down on said column but fixed against rotation thereon.a spirally corrugated pattern held fixedly on said arm, a counter weightsuspended from said column and coupled to said arm. a flask forreceiving said pattern. a turn table for fixedly receiving said flask.and a motor for driving said turn table.

7. An apparatus for casting pipe comprising a rotary column, an armslidable on said column and fixed to rotate therewith. a spirallycorrugated pattern held by said arm against axial turning movement. acap upon said column having pulleys thereon. cables running over saidpulleys and connected at one side to said arm, a counter weightconnected at the other side to said cables. a flask for receiving saidpattern and means for supporting and rotating said flask.

8. An apparatus for casting pipe comprising a rotary column.'an armmounted for longitudinal movement on said column and secured to rotatetherewith, a spirally corrugated pattern held fixedly on said arm. a.cap upon said column. pairs of spaced pulleys on said cap. pairs ofcables trained over said pulleys, said cables at one side of the columnbeing connected at spaced points to said arm, a counter weight at theother side of said column coupled at spaced points to the other ends ofthe cables, a flask for receivin said pattern, and rotary means forsupporting said pattern.

9 An apparatus for casting pipe comprising a rotary column, means tohold the column against rotation, a counter weighted arm slidable onsaid column and rotating therewith, a spirally corrugated patternsupported fixedly from said arm, a flask for receiving said pattern, anda rotary turn table for fixedly supporting said flask.

10. An apparatus for casting pipe comprising a spirally corrugatedpattern. means for supporting said pattern for axial movement whilerestricting the same against rotation, a flask for receiving saidpattern. a turn table for supporting said flask having means forcooperating with the flask to cause rotation thereof with the turntable.

a motor for driving said turn table, and a reduction gear between saidmotor and turn table.

11. An apparatus for casting pipe comprising a turn table, a shaft forsupporting 20 said turn table, bearings for said shaft, an internal gearupon the said turn table. a pinion meshing with said internal gear, areduction gear coupled to said last mentioned gear, a motor for drivingsaid first 25

